<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="./src/react.js"></script>
    <script src="./src/react-dom.js"></script>
    <script src="./src/babel.js"></script>
</head>
<body>
    <div id="app"></div>
</body>
<script type="text/babel">
    let falg = false;
    // let str;
    // if(falg){
    //     str=<h1>111111</h1>
    // }else{
    //     str=<p>333333</p>
    // }
    ReactDOM.render(
        // str,
        <div>
           { falg==false?<h1>111111</h1>:<p>4444</p>}
        </div>,
        document.getElementById('app')
    )
</script>
</html>